Nginx user unable to run entrypoint

[RajeshwariSubramaniam]

Describe the bug

We are extending the nginx:alpine image and attempting to run Nginx as the nginx user instead of the root user. However, we encounter a permission error when executing the entrypoint.

It appears that the home directory for the nginx user is set to /var/cache/nginx, but the nginx user lacks sufficient permissions to create folders within this directory.

To reproduce

Steps to reproduce the behavior:

1. Create a Dockerfile with the following content:

   FROM nginx:1.27.1-alpine-slim
   USER nginx

2. Build an image using the above Dockerfile.
3. Run a container from the created image
4. Observe the error.

Expected behavior

Since the home directory for the nginx user is /var/cache/nginx, the user should have the necessary permissions to create folders within this directory.

Your environment

• Version/release of Docker and method of installation (e.g. Docker Desktop / Docker Server) - Docker version 26.1.4, build 5650f9b
• Version/tag of the NGINX Docker image (e.g. nginx:alpine) - nginx:1.27.1-alpine-slim
• Target deployment platform (e.g. OpenShift / Kubernetes / Docker Compose / etc...) - N/A or Docker

Additional context

Add any other context about the problem here.

[thresheek]

That's normal, please see/use https://github.com/nginxinc/docker-nginx-unprivileged/ for that task.

[RajeshwariSubramaniam]

I wasn't aware. Thanks for sharing!